Marking-gage.



W. E. PERKINS. MARKING GAGE. APPLICATION FILED APR. 1. 1909.

Patented Feb. 8, 1910.

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UNITED STATES PATENT OFFICE.

WILLIAM EDWARD PERKINS, OF FLORENCE, COLORADO, ASSIGNOR OF FORTY-NINEONE-HUNDREDTHS TO HARRY E. GARLOCK, OF FLORENCE, COLORADO.

MARKING-GAGE.

To all whom 'it may concern:

Be it known that I, \VILLIAM E. PERKINS, a citizen of the United States,residing at Florence, in the county of Fremont and State of Colorado,have invented a new and useful Marking-Gage, of which the following is aspecification.

This invention relates to marking gages.

The object of the invention is to provide an implement of this characterwhich may be employed as a surface tester, a level and plumb, and amarker for laying off circular bodies, such as shafts, in locatingkey-seats, and which shall be simple in construction, efiicient anddurable in use, and accurate in performing the functions designed.

\Vith the above and other objects in view, as will appear as the natureof the invention is better understood, the same consists in the novelconstruction and combination of parts of a marking gage, as will behereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification, andin which like characters of reference indicate corresponding parts,Figure l is a view in front elevation of one form of marking gageconstructed in accordance with the present invention. Fig. 2 is avertical transverse sec tional view through the center of the gage. Fig.3 is a view in front elevation of a modified form of gage. Fig. l is avertical transverse sectional view through the center of the gage shownin Fig. 3.

The gage in Figs. 1 and 2, comprises, in an integral structure, agraduated counter sunk dial 1, and a pair of divergent legs 2, theterminals of which are preferably V- notclied, as at 3, to secureaccurate contact between the implement and the object in connection withwhich it is being used. At the crotch of the legs, and back of the dial,is formed a longitudinal bearing 4: that is engaged by a center punch 5which is of a length to project above the dial, and thus to protect thelatter from injury, as from hammer blows.

Arranged within the countersink 6 of the dial, and disposed flush withthe marginal face of the latter, is a disk indicator 7, preferably ofmetal, and which is held assem- Speeifieation of Letters Patent.

Application filed April 1, 1909.

l l l Patented Feb. 8, 1910.

Serial No. 487,200.

bled with the dial by apivot screw 8. Carried by and formed preferablyintegral with the indicator is a hollow counterweight 9 in which isarranged a spirit level tube 10 of the usual or any preferredconstruction, the bubble of which is exposed to view through a sightopening 11 formed at the center of the counterweight. The longitudinalaxis of the level is disposed exactly at right angles to a line drawnthrough the center of the indicator and cutting the pointer mark 12 andthe dial, and this will permit the implement to determine in an accuratemanner whether a surface is horizontal, or plumb, and if not how manydegrees or parts of degrees it is out.

In use in laying out a key-way on a shaft, when the location is decided,the punch is struck a blow, thus indicating one end of the key-way, andthe implement is then placed against the shaft at some distance from theprick mark, and by observing the pointer mark to see that it exactlycoincides with the graduation on the dial opposite which it was when thefirst punch mark was made, the second mark can be pricked in exactalinement with the first.

In the modified form shown in Figs. 3 and 4, the construction of theimplement is the same as that above described, as to the arrangement ofthe legs 13 and punch 14. The only difference is that the dial 15 isfiat, and an ordinary counterweighted pointer 16 is employed in lieu ofthe disk indicator. The operation of the two implements, however, is thesame, as the last-named can secure every function of that firstdescribed.

In the form of gage shown in Figs. 1 and 2 the pivot 8 is supported atits outer end by a bracket 1 secured to the rim of the dial andextending downwardly in front thereof.

\Vhat is claimed is:

1. A marking gage embodying a graduated dial having an offset 011 itsback, a pair of divergent legs projecting from said dial, a center punchmounted in the offset and passing between the legs, and an indicatorpivotally mounted in front of the dial.

2. A. marking gage embodying a graduated dial having an integral offseton its back, a pair of divergent legs projecting therefrom, a centerpunch mounted inthe In testimony that I claim the foregoing offset andpassing between the legs, a pivot as my own, I have hereto aflixed mysignasecured in the center of the dial, an indicator tnre in thepresence of two Witnesses.

mounted on said pivot, and a bracket se- WILLIAM EDNARD PERKINS. curedon the upper edge of the dial and dei \Vitnesses: pending in frontthereof to support the end H. E. GARLOGK, of the pivot in front of theindicator. i A. N. PARNALL.

